<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
    <script type="text/javascript">
        function displaymsg() {
            alert("hello world!");
        }

        function product(a,b) {
            return a*b;
        }
    </script>
	<title></title>
</head>
<body>
	
    <input type="button" value="Click me pls!" onclick=displaymsg() />
    <script type="text/javascript">
        document.write(product(3,5));
    </script>
</body>
</html>
